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Related Concept Videos

Glaucoma: Overview01:25

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
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Iris Fixation via External Pentagram Suturing
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Optic Disk Pit and Iridociliary Cyst Precipitating Angle Closure Glaucoma.

Sushmita Kaushik1, Parul Ichhpujani2, Savleen Kaur3

  • 1Associate Professor, Glaucoma Services, Advanced Eye Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India.

Journal of Current Glaucoma Practice
|March 22, 2016
PubMed
Summary

This case report details unilateral angle closure glaucoma, a rare presentation of the typically bilateral disease. It highlights how optic disk pits and iridociliary cysts can precipitate this severe form of glaucoma.

Keywords:
Angle closure glaucoma.Optic diskPit

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Optic Nerve Disorders

Background:

  • Primary angle closure glaucoma (PACG) is typically bilateral, though asymmetry is common.
  • Advanced glaucoma in one eye with no optic nerve damage in the fellow eye is highly unusual.
  • Understanding precipitating factors for PACG is crucial for early diagnosis and intervention.

Observation:

  • A rare case of unilateral PACG is presented.
  • The affected eye exhibited advanced glaucoma.
  • The fellow eye showed no signs of optic disk damage.

Findings:

  • The unilateral PACG was complicated by an optic disk pit.
  • Iridociliary cysts were also identified as a contributing factor.
  • These anomalies likely precipitated the angle closure glaucoma in a unilateral fashion.

Implications:

  • This case expands the understanding of PACG etiology and presentation.
  • Optic disk pits and iridociliary cysts should be considered in the differential diagnosis of unilateral PACG.
  • Further research into the role of these specific ocular anomalies in glaucoma development is warranted.